66 lines
2.4 KiB
Python
66 lines
2.4 KiB
Python
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import os
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import platform
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from .generic import MeshScript
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from ..constants import log
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from distutils.spawn import find_executable
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# start the search with the user's PATH
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_search_path = os.environ['PATH']
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# add additional search locations on windows
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if platform.system() == 'Windows':
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# split existing path by delimiter
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_search_path = [i for i in _search_path.split(';') if len(i) > 0]
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_search_path.append(os.path.normpath(r'C:\Program Files\OpenSCAD'))
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_search_path.append(os.path.normpath(r'C:\Program Files (x86)\OpenSCAD'))
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_search_path = ';'.join(_search_path)
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log.debug('searching for scad in: %s', _search_path)
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# add mac-specific search locations
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if platform.system() == 'Darwin':
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_search_path = [i for i in _search_path.split(':') if len(i) > 0]
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_search_path.append('/Applications/OpenSCAD.app/Contents/MacOS')
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_search_path = ':'.join(_search_path)
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log.debug('searching for scad in: %s', _search_path)
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# try to find the SCAD executable by name
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_scad_executable = find_executable('openscad', path=_search_path)
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if _scad_executable is None:
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_scad_executable = find_executable('OpenSCAD', path=_search_path)
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exists = _scad_executable is not None
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def interface_scad(meshes, script, debug=False, **kwargs):
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"""
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A way to interface with openSCAD which is itself an interface
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to the CGAL CSG bindings.
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CGAL is very stable if difficult to install/use, so this function provides a
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tempfile- happy solution for getting the basic CGAL CSG functionality.
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Parameters
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---------
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meshes: list of Trimesh objects
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script: string of the script to send to scad.
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Trimesh objects can be referenced in the script as
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$mesh_0, $mesh_1, etc.
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"""
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if not exists:
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raise ValueError('No SCAD available!')
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# OFF is a simple text format that references vertices by-index
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# making it slightly preferable to STL for this kind of exchange duty
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with MeshScript(meshes=meshes, script=script, debug=debug, exchange='off') as scad:
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result = scad.run(_scad_executable + ' $SCRIPT -o $MESH_POST')
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return result
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def boolean(meshes, operation='difference', debug=False, **kwargs):
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"""
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Run an operation on a set of meshes
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"""
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script = operation + '(){'
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for i in range(len(meshes)):
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script += 'import(\"$MESH_' + str(i) + '\");'
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script += '}'
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return interface_scad(meshes, script, debug=debug, **kwargs)
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